Clothes that change color in response to your heart rate? Bed linens that glow to treat seasonal affective disorder, P.M.S. or migraines? Alarm clocks woven into your pajamas? Murmuring wallpaper?

Lighting up: a woven fabric that incorporates fibre-based LEDs. (Courtesy: Yoel Fink) Smart clothes, where electronics are incorporated into fabrics, have long been touted as the next big thing. From ...